This article is really strange. the OP has only been at Red Hat for 4 months [1], and yet he speaks as though he's a Red Hat veteran.
Imagine feeling that, then hearing your employer was being acquired by pretty much the antithesis of that culture, on a decline and happy to destroy anyone for a perceived bump in their falling stock price.
It may be different if your perspective is that of a principal from some failed startup IBM bought. They were nice enough as long as the handcuffs lasted, you didn't care about the bogus 401k match, and your large-ish check cleared.